<div class="login">
  <h1 class="login_title">会员登录</h1>
  <div class="login_form">
    <div class="form-group">
      <input type="text" class="form-control user_id" placeholder="手机号/会员ID">
    </div>
    <div class="form-group">
      <input type="password" class="form-control user_pass" placeholder="密码">
      <span class="help-block text_danger pass_error">用户名或密码错误！</span>
    </div>
    <div class="form-group text_right pass_retrieval">
      <a href="##">忘记密码？</a>
    </div>
    <div class="form-group text_center">
      <a href="##" class="btn btn_login">登&nbsp;&nbsp;&nbsp;&nbsp;录</a>
    </div>
    <div class="form-group hs_color">
      没有账号？ <a href="##" class="active">立即注册</a>
    </div>
  </div>
</div>